School test

Open this on a school PC, press the button, then read the three results back to the chat.

Mailbox address (the web app link ending in /exec, from your personal Apps Script) Mailbox key

Your personal Google sign-in on this PC
Passed: this page opened.
This page can talk to your personal Apps Script
Not run yet: press the button.
Direct updates to the school script
Nothing to do here: Claude tests this from your home PC.

To read back

Press "Run the test" first.